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Whta is your opinion about 4L80E trannies? Are they any good?

Discussion in '1969-1972 K5 Blazer | Truck | Suburban' started by 72Blazerod, Nov 4, 2001.

  1. 72Blazerod

    72Blazerod 1/2 ton status

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    I meant to add this question to my last post but I forgot. The 97 5.7l TBI w/ Vortec heads comes along with a 4L80E. Right now I have a SM465 standard. I hadn't thought about going automatic but it would make it easier to pull the travel trailer.

    How strong are 4L80E trannies? What sorts of adapters would I need to mate it up with my NP205? What would I have to do about my crossmembers and driveshafts?

    Thanks guys,

    Rod

    <a target="_blank" href=http://communities.msn.ca/72BlazerodsOldChevyTruckPage/photoalbums.msnw>http://communities.msn.ca/72BlazerodsOldChevyTruckPage/photoalbums.msnw</a>
     
  2. DesertDueler

    DesertDueler 1/2 ton status

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    The 480LE are strong. Its basically a th400 with overdrive. As for adapters you need the th400 to 205 adapter. You will probably have to change the input shaft on the 205 to the 32 spline. You will probably have to move your crossmember back a little, and probably have to lengthen the front and shorten the rear.

    86Jimmy 4"&35"MTRs,87 burb 4"&35"MT,69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     
  3. Rhody

    Rhody Registered Member

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    Here's a question. I too may be looking to go from the Muncie 465 to an automatic someday way down the road. I have a 350 4 bolt main. Can I adapt a 4l80E to that. Also does anyone know what it would take to get one of these Allison Tranny's that they are putting in the new Silverado's. Can it be mated to an old 350/ 205 combo?

    Little Rhody
     
  4. Steve_Chin

    Steve_Chin 1/2 ton status

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    The 4L80E is tough. The only wierdness (other than mating it to the transfer case) is that it is electronically controlled. You will need a kit from JET or one of the other manufacturers to adapt the electronically-controlled tranny into a non-electronic application.
     
  5. 72Blazerod

    72Blazerod 1/2 ton status

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    Steve,

    Would this conversion to non-electically controlled be a problem if I swapped the 1998 engine and tranny as a unit with the computer?

    Thanks,

    Rod

    &lt;a target="_blank" href=http://communities.msn.ca/72BlazerodsOldChevyTruckPage/photoalbums.msnw&gt;http://communities.msn.ca/72BlazerodsOldChevyTruckPage/photoalbums.msnw&lt;/a&gt;<P ID="edit"><FONT class="small">Edited by 72Blazerod on 11/05/01 08:22 PM.</FONT></P>
     
  6. Steve_Chin

    Steve_Chin 1/2 ton status

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    Rod, it shouldn't be a problem if you swapped in the entire shebang.
     

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